ORA-12519: TNS :no appropriate service handler found .
ERROR : ORA-12519: TNS :no appropriate service handler found .
Solution :
SQL> show parameter processes NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ aq_tm_processes integer 1 db_writer_processes integer 1 gcs_server_processes integer 0 global_txn_processes integer 1 job_queue_processes integer 40 log_archive_max_processes integer 4 processes integer 300
SQL> alter system set processes=500 scope=spfile; System altered.
Restart database after this operation.